Product type:
Induction coil magnetometer

Product description:
New calculation methodology based on a minimum mass approach enabled us to minimize the weight while conserving the length necessary to provide low noise levels in a wide frequency band. The magnetic feedback design is utilized to provide a stable response over several decades of frequency. Over the flat band region the sensor operates as a B field detector; for the frequencies below the flat part the sensor response is proportional to signal frequency or to dB/dt derivative. A low noise preamplifier is placed inside the sensor.

Application description:
The LEMI-134 induction coil is used for active geophysical measurements like CSAMT in a wide frequency range. The band of frequencies the sensor operates in is suited for shallow applications like hydro-geophysics or mining.

Low noise, near the theoretically lowest possible level
Wide operation frequency band 0.5…50,000 Hz (0.5 to 200,000 Hz on special request)
Extremly light weight
Small outer dimensions

Product image:


  • Frequency range: 0.5 Hz to 50,000 Hz (0.5 Hz to 200,000 Hz on request)
  • Transformation factor in linear part: 4 mV/nT*Hz
  • Transformation factor in flat part: 20 mV/nT
  • Length: 400 mm
  • Weight: 320 g
  • Power consumption: 300 mW